Although Susie doesn't physically mature in heaven, she mentally becomes used to the fact that she is in heaven, and that she is dead. She copes with understanding that the only way her family can peacefully live their lives is if they move on.
I admit I not only opened up to the wrong person, I also expressed my hurt and frustration in the wrong way. Sometimes it really is better to keep things to yourself. Especially when you know you aren't being heard no matter what you do or say.